Improvement in joints for sheathing



UNITED STATES PATENT OFFICE.

NELSON G. NORTHUP, OF ST. PAUL, MINNESOTA.

IMPROVEMENTIN JOINTS FOR SHEATHING.

Specification forming part of Letters Patent No. 138,520, dated May 6, 1873; application led March 29, 1873.

To all 'whom it may concern.-

Be it known that I, NELSON G. NORTHUP, of St. Paul, in the county of Ramsey and State of Minnesota, have invented certain Improvements in Sheathing Houses, of which the tollowing is a specication:

The object of my invention is to provide'a more perfect method of joining upright sheathing than that ordinarilyY used, so that a house may be covered with a cheap, durable, and efcient protection from the weather, and one which is, at the same time, capable. of being made ornamental.

Battened sheathing is well known, where the joints of wide boards are covered with narrow strips nailed from the outside, and they are apt to warp or fsplit after a while, leaving openings to the Weather. Thel same objection occurs Where the sheathing' is merely matched together with a tongue and groove.

I make my joint by grooving both edges of the board A, and forming upon it rabbets, which lap upon the board B, the latter being tongued on both edges, thus covering the joint. The boards are blind-nailed to, the studding in the usual manner, and are not liable to warp or shrink unevenly.

In the drawing, Figures l and 3 show sections of my joint, and Figs. 2 and 4 are elevations of the same, respectively.

I sometimes make the tongued board thinner than the other, as shown in Fig. l, but sometimes rabbet the edges of it, :as shown at r r, in Figs. 3 and 4, giving the effect of a raised panel; or, make the boards A narrower than the boards B, and produce the eft'ectof battens.

My tongue and groove I makev at on the inner side and bevel or round them toward the outer, to facilitate putting the parts together without trouble.

I claim as my invention- 1. An upright sheathing, formed of the grooved and rabbeted board A and the tongued board B, when the rabbets lap upon the board B, all substantially as described.

2. A tongue/and groove for joining boards made dat on the inner and beveled or rounded on the outer side, substantially as and for the purpose set forth.

NELSON Gr. NOR'IHUP.' Tituesses:

CEAS. F. SLEEPEE, W. P. MURRAY. 

